1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* This file defines the grammar of C and that of Objective C.
21 ifobjc ... end ifobjc conditionals contain code for Objective C only.
22 ifc ... end ifc conditionals contain code for C only.
23 The awk script cond.awk is used to convert this file into
24 c-parse.y and into objc-parse.y. */
26 /* To whomever it may concern: I have heard that such a thing was once
27 written by AT&T, but I have never seen it. */
35 /* These are the 8 conflicts you should get in parse.output;
36 the state numbers may vary if minor changes in the grammar are made.
38 State 41 contains 1 shift/reduce conflict. (Two ways to recover from error.)
39 State 92 contains 1 shift/reduce conflict. (Two ways to recover from error.)
40 State 99 contains 1 shift/reduce conflict. (Two ways to recover from error.)
41 State 103 contains 1 shift/reduce conflict. (Two ways to recover from error.)
42 State 119 contains 1 shift/reduce conflict. (See comment at component_decl.)
43 State 183 contains 1 shift/reduce conflict. (Two ways to recover from error.)
44 State 193 contains 1 shift/reduce conflict. (Two ways to recover from error.)
45 State 199 contains 1 shift/reduce conflict. (Two ways to recover from error.)
61 #ifdef MULTIBYTE_CHARS
70 /* Since parsers are distinct for each language, put the language string
73 char *language_string = "GNU Obj-C";
76 char *language_string = "GNU C";
85 /* Like YYERROR but do call yyerror. */
86 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
88 /* Cause the `yydebug' variable to be defined. */
94 %union {long itype; tree ttype; enum tree_code code;
95 char *filename; int lineno; }
97 /* All identifiers that are not reserved words
98 and are not declared typedefs in the current block */
101 /* All identifiers that are declared typedefs in the current block.
102 In some contexts, they are treated just like IDENTIFIER,
103 but they can also serve as typespecs in declarations. */
106 /* Reserved words that specify storage class.
107 yylval contains an IDENTIFIER_NODE which indicates which one. */
110 /* Reserved words that specify type.
111 yylval contains an IDENTIFIER_NODE which indicates which one. */
114 /* Reserved words that qualify type: "const" or "volatile".
115 yylval contains an IDENTIFIER_NODE which indicates which one. */
118 /* Character or numeric constants.
119 yylval is the node for the constant. */
122 /* String constants in raw form.
123 yylval is a STRING_CST node. */
126 /* "...", used for functions with variable arglists. */
129 /* the reserved words */
130 /* SCO include files test "ASM", so use something else. */
131 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
132 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF ALIGN
133 %token ATTRIBUTE EXTENSION LABEL
134 %token REALPART IMAGPART
136 /* Add precedence rules to solve dangling else s/r conflict */
140 /* Define the operator tokens and their precedences.
141 The value is an integer because, if used, it is the tree code
142 to use in the expression made from the operator. */
144 %right <code> ASSIGN '='
145 %right <code> '?' ':'
151 %left <code> EQCOMPARE
152 %left <code> ARITHCOMPARE
153 %left <code> LSHIFT RSHIFT
155 %left <code> '*' '/' '%'
156 %right <code> UNARY PLUSPLUS MINUSMINUS
158 %left <code> POINTSAT '.' '(' '['
160 /* The Objective-C keywords. These are included in C and in
161 Objective C, so that the token codes are the same in both. */
162 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
163 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
165 /* Objective-C string constants in raw form.
166 yylval is an OBJC_STRING_CST node. */
172 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
173 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
174 %type <ttype> typed_declspecs reserved_declspecs
175 %type <ttype> typed_typespecs reserved_typespecquals
176 %type <ttype> declmods typespec typespecqual_reserved
177 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
178 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
179 %type <ttype> init initlist maybeasm
180 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
181 %type <ttype> maybe_attribute attribute_list attrib
183 %type <ttype> compstmt
185 %type <ttype> declarator
186 %type <ttype> notype_declarator after_type_declarator
187 %type <ttype> parm_declarator
189 %type <ttype> structsp component_decl_list component_decl_list2
190 %type <ttype> component_decl components component_declarator
191 %type <ttype> enumlist enumerator
192 %type <ttype> typename absdcl absdcl1 type_quals
193 %type <ttype> xexpr parms parm identifiers
195 %type <ttype> parmlist parmlist_1 parmlist_2
196 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
197 %type <ttype> identifiers_or_typenames
199 %type <itype> setspecs
201 %type <filename> save_filename
202 %type <lineno> save_lineno
205 /* the Objective-C nonterminals */
207 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
208 %type <ttype> methoddecl unaryselector keywordselector selector
209 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
210 %type <ttype> keywordexpr keywordarglist keywordarg
211 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
212 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
213 %type <ttype> objc_string protocolrefs identifier_list objcprotocolexpr
214 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
218 /* Number of statements (loosely speaking) seen so far. */
219 static int stmt_count;
221 /* Input file and line number of the end of the body of last simple_if;
222 used by the stmt-rule immediately after simple_if returns. */
223 static char *if_stmt_file;
224 static int if_stmt_line;
226 /* List of types and structure classes of the current declaration. */
227 static tree current_declspecs;
229 /* Stack of saved values of current_declspecs. */
230 static tree declspec_stack;
232 /* 1 if we explained undeclared var errors. */
233 static int undeclared_variable_notice;
236 /* Objective-C specific information */
238 tree objc_interface_context;
239 tree objc_implementation_context;
240 tree objc_method_context;
241 tree objc_ivar_chain;
242 tree objc_ivar_context;
243 enum tree_code objc_inherit_code;
244 int objc_receiver_context;
245 int objc_public_flag;
249 /* Tell yyparse how to print a token's value, if yydebug is set. */
251 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
252 extern void yyprint ();
258 pedwarn ("ANSI C forbids an empty source file");
265 /* In case there were missing closebraces,
266 get us back to the global binding level. */
267 while (! global_bindings_p ())
275 /* the reason for the strange actions in this rule
276 is so that notype_initdecls when reached via datadef
277 can find a valid list of type and sc specs in $0. */
280 {$<ttype>$ = NULL_TREE; } extdef
281 | extdefs {$<ttype>$ = NULL_TREE; } extdef
290 | ASM_KEYWORD '(' expr ')' ';'
292 if ((TREE_CODE ($3) == ADDR_EXPR
293 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
294 || TREE_CODE ($3) == STRING_CST)
297 error ("argument of `asm' is not a constant string"); }
301 setspecs notype_initdecls ';'
303 error ("ANSI C forbids data definition with no type or storage class");
304 else if (!flag_traditional)
305 warning ("data definition has no type or storage class"); }
306 | declmods setspecs notype_initdecls ';'
308 | typed_declspecs setspecs initdecls ';'
311 { pedwarn ("empty declaration"); }
312 | typed_declspecs ';'
318 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
322 typed_declspecs setspecs declarator
323 { if (! start_function ($1, $3, 0))
325 reinit_parse_for_function (); }
327 { store_parm_decls (); }
329 { finish_function (0); }
330 | typed_declspecs setspecs declarator error
332 | declmods setspecs notype_declarator
333 { if (! start_function ($1, $3, 0))
335 reinit_parse_for_function (); }
337 { store_parm_decls (); }
339 { finish_function (0); }
340 | declmods setspecs notype_declarator error
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2, 0))
345 reinit_parse_for_function (); }
347 { store_parm_decls (); }
349 { finish_function (0); }
350 | setspecs notype_declarator error
366 { $$ = NEGATE_EXPR; }
368 { $$ = CONVERT_EXPR; }
370 { $$ = PREINCREMENT_EXPR; }
372 { $$ = PREDECREMENT_EXPR; }
374 { $$ = BIT_NOT_EXPR; }
376 { $$ = TRUTH_NOT_EXPR; }
379 expr: nonnull_exprlist
380 { $$ = build_compound_expr ($1); }
391 { $$ = build_tree_list (NULL_TREE, $1); }
392 | nonnull_exprlist ',' expr_no_commas
393 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
398 | '*' cast_expr %prec UNARY
399 { $$ = build_indirect_ref ($2, "unary *"); }
400 /* __extension__ turns off -pedantic for following primary. */
402 { $<itype>1 = pedantic;
404 cast_expr %prec UNARY
406 pedantic = $<itype>1; }
407 | unop cast_expr %prec UNARY
408 { $$ = build_unary_op ($1, $2, 0);
409 overflow_warning ($$); }
410 /* Refer to the address of a label as a pointer. */
412 { tree label = lookup_label ($2);
414 $$ = null_pointer_node;
417 TREE_USED (label) = 1;
418 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
419 TREE_CONSTANT ($$) = 1;
422 /* This seems to be impossible on some machines, so let's turn it off.
423 You can use __builtin_next_arg to find the anonymous stack args.
425 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
426 $$ = error_mark_node;
427 if (TREE_VALUE (tree_last (types)) == void_type_node)
428 error ("`&...' used in function with fixed number of arguments");
432 pedwarn ("ANSI C forbids `&...'");
433 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
434 $$ = build_unary_op (ADDR_EXPR, $$, 0);
437 | SIZEOF unary_expr %prec UNARY
438 { if (TREE_CODE ($2) == COMPONENT_REF
439 && DECL_BIT_FIELD (TREE_OPERAND ($2, 1)))
440 error ("`sizeof' applied to a bit-field");
441 $$ = c_sizeof (TREE_TYPE ($2)); }
442 | SIZEOF '(' typename ')' %prec HYPERUNARY
443 { $$ = c_sizeof (groktypename ($3)); }
444 | ALIGNOF unary_expr %prec UNARY
445 { $$ = c_alignof_expr ($2); }
446 | ALIGNOF '(' typename ')' %prec HYPERUNARY
447 { $$ = c_alignof (groktypename ($3)); }
448 | REALPART unary_expr %prec UNARY
449 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
450 | IMAGPART unary_expr %prec UNARY
451 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
452 | REALPART '(' unary_expr ')' %prec HYPERUNARY
453 { $$ = build_unary_op (REALPART_EXPR, $3, 0); }
454 | IMAGPART '(' unary_expr ')' %prec HYPERUNARY
455 { $$ = build_unary_op (IMAGPART_EXPR, $3, 0); }
460 | '(' typename ')' cast_expr %prec UNARY
461 { tree type = groktypename ($2);
462 $$ = build_c_cast (type, $4); }
463 | '(' typename ')' '{' initlist maybecomma '}' %prec UNARY
464 { tree type = groktypename ($2);
467 pedwarn ("ANSI C forbids constructor expressions");
468 if (TYPE_NAME (type) != 0)
470 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
471 name = IDENTIFIER_POINTER (TYPE_NAME (type));
473 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
477 $$ = digest_init (type, build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($5)),
478 NULL_PTR, 0, 0, name);
479 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
481 int failure = complete_array_type (type, $$, 1);
490 | expr_no_commas '+' expr_no_commas
491 { $$ = parser_build_binary_op ($2, $1, $3); }
492 | expr_no_commas '-' expr_no_commas
493 { $$ = parser_build_binary_op ($2, $1, $3); }
494 | expr_no_commas '*' expr_no_commas
495 { $$ = parser_build_binary_op ($2, $1, $3); }
496 | expr_no_commas '/' expr_no_commas
497 { $$ = parser_build_binary_op ($2, $1, $3); }
498 | expr_no_commas '%' expr_no_commas
499 { $$ = parser_build_binary_op ($2, $1, $3); }
500 | expr_no_commas LSHIFT expr_no_commas
501 { $$ = parser_build_binary_op ($2, $1, $3); }
502 | expr_no_commas RSHIFT expr_no_commas
503 { $$ = parser_build_binary_op ($2, $1, $3); }
504 | expr_no_commas ARITHCOMPARE expr_no_commas
505 { $$ = parser_build_binary_op ($2, $1, $3); }
506 | expr_no_commas EQCOMPARE expr_no_commas
507 { $$ = parser_build_binary_op ($2, $1, $3); }
508 | expr_no_commas '&' expr_no_commas
509 { $$ = parser_build_binary_op ($2, $1, $3); }
510 | expr_no_commas '|' expr_no_commas
511 { $$ = parser_build_binary_op ($2, $1, $3); }
512 | expr_no_commas '^' expr_no_commas
513 { $$ = parser_build_binary_op ($2, $1, $3); }
514 | expr_no_commas ANDAND expr_no_commas
515 { $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $3); }
516 | expr_no_commas OROR expr_no_commas
517 { $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $3); }
518 | expr_no_commas '?' xexpr ':' expr_no_commas
519 { $$ = build_conditional_expr ($1, $3, $5); }
520 | expr_no_commas '=' expr_no_commas
521 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
522 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
523 | expr_no_commas ASSIGN expr_no_commas
524 { $$ = build_modify_expr ($1, $2, $3);
525 /* This inhibits warnings in truthvalue_conversion. */
526 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
535 if (!$$ || $$ == error_mark_node)
537 if (yychar == YYEMPTY)
544 if (objc_receiver_context
545 && ! (objc_receiver_context
546 && strcmp (IDENTIFIER_POINTER ($1), "super")))
547 /* we have a message to super */
548 $$ = get_super_receiver ();
549 else if (objc_method_context
550 && (decl = is_ivar (objc_ivar_chain, $1)))
552 if (is_private (decl))
553 $$ = error_mark_node;
555 $$ = build_ivar_reference ($1);
560 /* Ordinary implicit function declaration. */
561 $$ = implicitly_declare ($1);
562 assemble_external ($$);
566 else if (current_function_decl == 0)
568 error ("`%s' undeclared, outside of functions",
569 IDENTIFIER_POINTER ($1));
570 $$ = error_mark_node;
577 if (objc_receiver_context
578 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
579 /* we have a message to super */
580 $$ = get_super_receiver ();
581 else if (objc_method_context
582 && (decl = is_ivar (objc_ivar_chain, $1)))
584 if (is_private (decl))
585 $$ = error_mark_node;
587 $$ = build_ivar_reference ($1);
592 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
593 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
595 error ("`%s' undeclared (first use this function)",
596 IDENTIFIER_POINTER ($1));
598 if (! undeclared_variable_notice)
600 error ("(Each undeclared identifier is reported only once");
601 error ("for each function it appears in.)");
602 undeclared_variable_notice = 1;
605 $$ = error_mark_node;
606 /* Prevent repeated error messages. */
607 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
608 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
612 else if (TREE_TYPE ($$) == error_mark_node)
613 $$ = error_mark_node;
614 else if (C_DECL_ANTICIPATED ($$))
616 /* The first time we see a build-in function used,
617 if it has not been declared. */
618 C_DECL_ANTICIPATED ($$) = 0;
619 if (yychar == YYEMPTY)
623 /* Omit the implicit declaration we
624 would ordinarily do, so we don't lose
625 the actual built in type.
626 But print a diagnostic for the mismatch. */
628 if (objc_method_context
629 && is_ivar (objc_ivar_chain, $1))
630 error ("Instance variable `%s' implicitly declared as function",
631 IDENTIFIER_POINTER (DECL_NAME ($$)));
634 if (TREE_CODE ($$) != FUNCTION_DECL)
635 error ("`%s' implicitly declared as function",
636 IDENTIFIER_POINTER (DECL_NAME ($$)));
637 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
638 != TYPE_MODE (integer_type_node))
639 && (TREE_TYPE (TREE_TYPE ($$))
641 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
642 IDENTIFIER_POINTER (DECL_NAME ($$)));
643 /* If it really returns void, change that to int. */
644 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
646 = build_function_type (integer_type_node,
647 TYPE_ARG_TYPES (TREE_TYPE ($$)));
650 pedwarn ("built-in function `%s' used without declaration",
651 IDENTIFIER_POINTER (DECL_NAME ($$)));
653 /* Do what we would ordinarily do when a fn is used. */
654 assemble_external ($$);
659 assemble_external ($$);
662 /* we have a definition - still check if iVariable */
664 if (!objc_receiver_context
665 || (objc_receiver_context
666 && strcmp (IDENTIFIER_POINTER ($1), "super")))
670 if (objc_method_context
671 && (decl = is_ivar (objc_ivar_chain, $1)))
673 if (IDENTIFIER_LOCAL_VALUE ($1))
674 warning ("local declaration of `%s' hides instance variable",
675 IDENTIFIER_POINTER ($1));
678 if (is_private (decl))
679 $$ = error_mark_node;
681 $$ = build_ivar_reference ($1);
685 else /* we have a message to super */
686 $$ = get_super_receiver ();
690 if (TREE_CODE ($$) == CONST_DECL)
692 $$ = DECL_INITIAL ($$);
693 /* This is to prevent an enum whose value is 0
694 from being considered a null pointer constant. */
695 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
696 TREE_CONSTANT ($$) = 1;
701 { $$ = combine_strings ($1); }
703 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
704 if (class == 'e' || class == '1'
705 || class == '2' || class == '<')
706 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
709 { $$ = error_mark_node; }
711 { if (current_function_decl == 0)
713 error ("braced-group within expression allowed only inside a function");
716 /* We must force a BLOCK for this level
717 so that, if it is not expanded later,
718 there is a way to turn off the entire subtree of blocks
719 that are contained in it. */
721 push_iterator_stack ();
723 $<ttype>$ = expand_start_stmt_expr (); }
727 pedwarn ("ANSI C forbids braced-groups within expressions");
728 pop_iterator_stack ();
730 rtl_exp = expand_end_stmt_expr ($<ttype>2);
731 /* The statements have side effects, so the group does. */
732 TREE_SIDE_EFFECTS (rtl_exp) = 1;
734 /* Make a BIND_EXPR for the BLOCK already made. */
735 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
736 NULL_TREE, rtl_exp, $3);
737 /* Remove the block from the tree at this point.
738 It gets put back at the proper place
739 when the BIND_EXPR is expanded. */
742 | primary '(' exprlist ')' %prec '.'
743 { $$ = build_function_call ($1, $3); }
744 | primary '[' expr ']' %prec '.'
745 { $$ = build_array_ref ($1, $3); }
746 | primary '.' identifier
749 if (doing_objc_thang)
751 if (is_public ($1, $3))
752 $$ = build_component_ref ($1, $3);
754 $$ = error_mark_node;
758 $$ = build_component_ref ($1, $3);
760 | primary POINTSAT identifier
762 tree expr = build_indirect_ref ($1, "->");
765 if (doing_objc_thang)
767 if (is_public (expr, $3))
768 $$ = build_component_ref (expr, $3);
770 $$ = error_mark_node;
774 $$ = build_component_ref (expr, $3);
777 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
779 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
782 { $$ = build_message_expr ($1); }
784 { $$ = build_selector_expr ($1); }
786 { $$ = build_protocol_expr ($1); }
788 { $$ = build_encode_expr ($1); }
790 { $$ = build_objc_string_object ($1); }
794 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
798 { $$ = chainon ($1, $2); }
802 /* Produces an OBJC_STRING_CST with prehaps more OBJC_STRING_CSTs chained
806 | objc_string OBJC_STRING
807 { $$ = chainon ($1, $2); }
815 /* ... is used here to indicate a varargs function. */
818 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
821 /* The following are analogous to lineno_decl, decls and decl
822 except that they do not allow nested functions.
823 They are used for old-style parm decls. */
825 save_filename save_lineno datadecl
832 | datadecls lineno_datadecl
833 | lineno_datadecl errstmt
837 typed_declspecs setspecs initdecls ';'
838 { current_declspecs = TREE_VALUE (declspec_stack);
839 declspec_stack = TREE_CHAIN (declspec_stack);
840 resume_momentary ($2); }
841 | declmods setspecs notype_initdecls ';'
842 { current_declspecs = TREE_VALUE (declspec_stack);
843 declspec_stack = TREE_CHAIN (declspec_stack);
844 resume_momentary ($2); }
845 | typed_declspecs ';'
846 { shadow_tag_warned ($1, 1);
847 pedwarn ("empty declaration"); }
849 { pedwarn ("empty declaration"); }
852 /* This combination which saves a lineno before a decl
853 is the normal thing to use, rather than decl itself.
854 This is to avoid shift/reduce conflicts in contexts
855 where statement labels are allowed. */
857 save_filename save_lineno decl
865 | lineno_decl errstmt
868 /* records the type and storage class specs to use for processing
869 the declarators that follow.
870 Maintains a stack of outer-level values of current_declspecs,
871 for the sake of parm declarations nested in function declarators. */
872 setspecs: /* empty */
873 { $$ = suspend_momentary ();
874 pending_xref_error ();
875 declspec_stack = tree_cons (NULL_TREE, current_declspecs,
877 current_declspecs = $<ttype>0; }
881 typed_declspecs setspecs initdecls ';'
882 { current_declspecs = TREE_VALUE (declspec_stack);
883 declspec_stack = TREE_CHAIN (declspec_stack);
884 resume_momentary ($2); }
885 | declmods setspecs notype_initdecls ';'
886 { current_declspecs = TREE_VALUE (declspec_stack);
887 declspec_stack = TREE_CHAIN (declspec_stack);
888 resume_momentary ($2); }
889 | typed_declspecs setspecs nested_function
890 { current_declspecs = TREE_VALUE (declspec_stack);
891 declspec_stack = TREE_CHAIN (declspec_stack);
892 resume_momentary ($2); }
893 | declmods setspecs notype_nested_function
894 { current_declspecs = TREE_VALUE (declspec_stack);
895 declspec_stack = TREE_CHAIN (declspec_stack);
896 resume_momentary ($2); }
897 | typed_declspecs ';'
900 { pedwarn ("empty declaration"); }
903 /* Declspecs which contain at least one type specifier or typedef name.
904 (Just `const' or `volatile' is not enough.)
905 A typedef'd name following these is taken as a name to be declared. */
908 typespec reserved_declspecs
909 { $$ = tree_cons (NULL_TREE, $1, $2); }
910 | declmods typespec reserved_declspecs
911 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
914 reserved_declspecs: /* empty */
916 | reserved_declspecs typespecqual_reserved
917 { $$ = tree_cons (NULL_TREE, $2, $1); }
918 | reserved_declspecs SCSPEC
919 { if (extra_warnings)
920 warning ("`%s' is not at beginning of declaration",
921 IDENTIFIER_POINTER ($2));
922 $$ = tree_cons (NULL_TREE, $2, $1); }
925 /* List of just storage classes and type modifiers.
926 A declaration can start with just this, but then it cannot be used
927 to redeclare a typedef-name. */
931 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
932 TREE_STATIC ($$) = 1; }
934 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
936 { $$ = tree_cons (NULL_TREE, $2, $1);
937 TREE_STATIC ($$) = 1; }
939 { if (extra_warnings && TREE_STATIC ($1))
940 warning ("`%s' is not at beginning of declaration",
941 IDENTIFIER_POINTER ($2));
942 $$ = tree_cons (NULL_TREE, $2, $1);
943 TREE_STATIC ($$) = TREE_STATIC ($1); }
947 /* Used instead of declspecs where storage classes are not allowed
948 (that is, for typenames and structure components).
949 Don't accept a typedef-name if anything but a modifier precedes it. */
952 typespec reserved_typespecquals
953 { $$ = tree_cons (NULL_TREE, $1, $2); }
954 | nonempty_type_quals typespec reserved_typespecquals
955 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
958 reserved_typespecquals: /* empty */
960 | reserved_typespecquals typespecqual_reserved
961 { $$ = tree_cons (NULL_TREE, $2, $1); }
964 /* A typespec (but not a type qualifier).
965 Once we have seen one of these in a declaration,
966 if a typedef name appears then it is being redeclared. */
971 { /* For a typedef name, record the meaning, not the name.
972 In case of `foo foo, bar;'. */
973 $$ = lookup_name ($1); }
975 | CLASSNAME protocolrefs
976 { $$ = get_static_reference ($1, $2); }
977 | OBJECTNAME protocolrefs
978 { $$ = get_object_reference ($2); }
980 | TYPEOF '(' expr ')'
981 { $$ = TREE_TYPE ($3); }
982 | TYPEOF '(' typename ')'
983 { $$ = groktypename ($3); }
986 /* A typespec that is a reserved word, or a type qualifier. */
988 typespecqual_reserved: TYPESPEC
995 | initdecls ',' initdcl
1000 | notype_initdecls ',' initdcl
1006 | ASM_KEYWORD '(' string ')'
1007 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1013 declarator maybeasm maybe_attribute '='
1014 { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
1016 /* Note how the declaration of the variable is in effect while its init is parsed! */
1017 { decl_attributes ($<ttype>5, $3);
1018 finish_decl ($<ttype>5, $6, $2); }
1019 | declarator maybeasm maybe_attribute
1020 { tree d = start_decl ($1, current_declspecs, 0);
1021 decl_attributes (d, $3);
1022 finish_decl (d, NULL_TREE, $2); }
1026 notype_declarator maybeasm maybe_attribute '='
1027 { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
1029 /* Note how the declaration of the variable is in effect while its init is parsed! */
1030 { decl_attributes ($<ttype>5, $3);
1031 finish_decl ($<ttype>5, $6, $2); }
1032 | notype_declarator maybeasm maybe_attribute
1033 { tree d = start_decl ($1, current_declspecs, 0);
1034 decl_attributes (d, $3);
1035 finish_decl (d, NULL_TREE, $2); }
1037 /* the * rules are dummies to accept the Apollo extended syntax
1038 so that the header files compile. */
1042 | ATTRIBUTE '(' '(' attribute_list ')' ')'
1048 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1049 | attribute_list ',' attrib
1050 { $$ = tree_cons (NULL_TREE, $3, $1); }
1055 { if (strcmp (IDENTIFIER_POINTER ($1), "packed"))
1056 warning ("`%s' attribute directive ignored",
1057 IDENTIFIER_POINTER ($1));
1059 | IDENTIFIER '(' IDENTIFIER ')'
1060 { /* If not "mode (m)", then issue warning. */
1061 if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0)
1063 warning ("`%s' attribute directive ignored",
1064 IDENTIFIER_POINTER ($1));
1068 $$ = tree_cons ($1, $3, NULL_TREE); }
1069 | IDENTIFIER '(' CONSTANT ')'
1070 { /* if not "aligned(n)", then issue warning */
1071 if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0
1072 || TREE_CODE ($3) != INTEGER_CST)
1074 warning ("`%s' attribute directive ignored",
1075 IDENTIFIER_POINTER ($1));
1079 $$ = tree_cons ($1, $3, NULL_TREE); }
1080 | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')'
1081 { /* if not "format(...)", then issue warning */
1082 if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0
1083 || TREE_CODE ($5) != INTEGER_CST
1084 || TREE_CODE ($7) != INTEGER_CST)
1086 warning ("`%s' attribute directive ignored",
1087 IDENTIFIER_POINTER ($1));
1093 tree_cons ($5, $7, NULL_TREE),
1101 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, NULL_TREE);
1103 pedwarn ("ANSI C forbids empty initializer braces"); }
1105 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
1106 | '{' initlist ',' '}'
1107 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
1112 /* This chain is built in reverse order,
1113 and put in forward order where initlist is used. */
1116 { $$ = build_tree_list (NULL_TREE, $1); }
1118 { $$ = tree_cons (NULL_TREE, $3, $1); }
1119 /* These are for labeled elements. The syntax for an array element
1120 initializer conflicts with the syntax for an Objective-C message,
1121 so don't include these productions in the Objective-C grammer. */
1123 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
1124 { $$ = build_tree_list (tree_cons ($2, NULL_TREE,
1125 build_tree_list ($4, NULL_TREE)),
1127 | initlist ',' '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
1128 { $$ = tree_cons (tree_cons ($4, NULL_TREE,
1129 build_tree_list ($6, NULL_TREE)),
1132 | '[' expr_no_commas ']' init
1133 { $$ = build_tree_list ($2, $4); }
1134 | initlist ',' '[' expr_no_commas ']' init
1135 { $$ = tree_cons ($4, $6, $1); }
1137 | identifier ':' init
1138 { $$ = build_tree_list ($1, $3); }
1139 | initlist ',' identifier ':' init
1140 { $$ = tree_cons ($3, $5, $1); }
1145 { push_c_function_context ();
1146 if (! start_function (current_declspecs, $1, 1))
1148 pop_c_function_context ();
1151 reinit_parse_for_function ();
1152 store_parm_decls (); }
1153 /* This used to use compstmt_or_error.
1154 That caused a bug with input `f(g) int g {}',
1155 where the use of YYERROR1 above caused an error
1156 which then was handled by compstmt_or_error.
1157 There followed a repeated execution of that same rule,
1158 which called YYERROR1 again, and so on. */
1160 { finish_function (1);
1161 pop_c_function_context (); }
1164 notype_nested_function:
1166 { push_c_function_context ();
1167 if (! start_function (current_declspecs, $1, 1))
1169 pop_c_function_context ();
1172 reinit_parse_for_function ();
1173 store_parm_decls (); }
1174 /* This used to use compstmt_or_error.
1175 That caused a bug with input `f(g) int g {}',
1176 where the use of YYERROR1 above caused an error
1177 which then was handled by compstmt_or_error.
1178 There followed a repeated execution of that same rule,
1179 which called YYERROR1 again, and so on. */
1181 { finish_function (1);
1182 pop_c_function_context (); }
1185 /* Any kind of declarator (thus, all declarators allowed
1186 after an explicit typespec). */
1189 after_type_declarator
1193 /* A declarator that is allowed only after an explicit typespec. */
1195 after_type_declarator:
1196 '(' after_type_declarator ')'
1198 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1199 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1200 /* | after_type_declarator '(' error ')' %prec '.'
1201 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1202 poplevel (0, 0, 0); } */
1203 | after_type_declarator '[' expr ']' %prec '.'
1204 { $$ = build_nt (ARRAY_REF, $1, $3); }
1205 | after_type_declarator '[' ']' %prec '.'
1206 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1207 | '*' type_quals after_type_declarator %prec UNARY
1208 { $$ = make_pointer_declarator ($2, $3); }
1215 /* Kinds of declarator that can appear in a parameter list
1216 in addition to notype_declarator. This is like after_type_declarator
1217 but does not allow a typedef name in parentheses as an identifier
1218 (because it would conflict with a function with that typedef as arg). */
1221 parm_declarator '(' parmlist_or_identifiers %prec '.'
1222 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1223 /* | parm_declarator '(' error ')' %prec '.'
1224 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1225 poplevel (0, 0, 0); } */
1226 | parm_declarator '[' expr ']' %prec '.'
1227 { $$ = build_nt (ARRAY_REF, $1, $3); }
1228 | parm_declarator '[' ']' %prec '.'
1229 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1230 | '*' type_quals parm_declarator %prec UNARY
1231 { $$ = make_pointer_declarator ($2, $3); }
1235 /* A declarator allowed whether or not there has been
1236 an explicit typespec. These cannot redeclare a typedef-name. */
1239 notype_declarator '(' parmlist_or_identifiers %prec '.'
1240 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1241 /* | notype_declarator '(' error ')' %prec '.'
1242 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1243 poplevel (0, 0, 0); } */
1244 | '(' notype_declarator ')'
1246 | '*' type_quals notype_declarator %prec UNARY
1247 { $$ = make_pointer_declarator ($2, $3); }
1248 | notype_declarator '[' expr ']' %prec '.'
1249 { $$ = build_nt (ARRAY_REF, $1, $3); }
1250 | notype_declarator '[' ']' %prec '.'
1251 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1256 STRUCT identifier '{'
1257 { $$ = start_struct (RECORD_TYPE, $2);
1258 /* Start scope of tag before parsing components. */
1260 component_decl_list '}'
1261 { $$ = finish_struct ($<ttype>4, $5);
1262 /* Really define the structure. */
1264 | STRUCT '{' component_decl_list '}'
1265 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1268 { $$ = xref_tag (RECORD_TYPE, $2); }
1269 | UNION identifier '{'
1270 { $$ = start_struct (UNION_TYPE, $2); }
1271 component_decl_list '}'
1272 { $$ = finish_struct ($<ttype>4, $5); }
1273 | UNION '{' component_decl_list '}'
1274 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1277 { $$ = xref_tag (UNION_TYPE, $2); }
1278 | ENUM identifier '{'
1279 { $<itype>3 = suspend_momentary ();
1280 $$ = start_enum ($2); }
1281 enumlist maybecomma_warn '}'
1282 { $$ = finish_enum ($<ttype>4, nreverse ($5));
1283 resume_momentary ($<itype>3); }
1285 { $<itype>2 = suspend_momentary ();
1286 $$ = start_enum (NULL_TREE); }
1287 enumlist maybecomma_warn '}'
1288 { $$ = finish_enum ($<ttype>3, nreverse ($4));
1289 resume_momentary ($<itype>2); }
1291 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1302 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1305 component_decl_list:
1306 component_decl_list2
1308 | component_decl_list2 component_decl
1309 { $$ = chainon ($1, $2);
1310 pedwarn ("no semicolon at end of struct or union"); }
1313 component_decl_list2: /* empty */
1315 | component_decl_list2 component_decl ';'
1316 { $$ = chainon ($1, $2); }
1317 | component_decl_list2 ';'
1319 pedwarn ("extra semicolon in struct or union specified"); }
1321 /* foo(sizeof(struct{ @defs(ClassName)})); */
1322 | DEFS '(' CLASSNAME ')'
1324 tree interface = lookup_interface ($3);
1327 $$ = get_class_ivars (interface);
1330 error ("Cannot find interface declaration for `%s'",
1331 IDENTIFIER_POINTER ($3));
1338 /* There is a shift-reduce conflict here, because `components' may
1339 start with a `typename'. It happens that shifting (the default resolution)
1340 does the right thing, because it treats the `typename' as part of
1341 a `typed_typespecs'.
1343 It is possible that this same technique would allow the distinction
1344 between `notype_initdecls' and `initdecls' to be eliminated.
1345 But I am being cautious and not trying it. */
1348 typed_typespecs setspecs components
1350 current_declspecs = TREE_VALUE (declspec_stack);
1351 declspec_stack = TREE_CHAIN (declspec_stack);
1352 resume_momentary ($2); }
1355 pedwarn ("ANSI C forbids member declarations with no members");
1358 | nonempty_type_quals setspecs components
1360 current_declspecs = TREE_VALUE (declspec_stack);
1361 declspec_stack = TREE_CHAIN (declspec_stack);
1362 resume_momentary ($2); }
1363 | nonempty_type_quals
1365 pedwarn ("ANSI C forbids member declarations with no members");
1373 component_declarator
1374 | components ',' component_declarator
1375 { $$ = chainon ($1, $3); }
1378 component_declarator:
1379 save_filename save_lineno declarator maybe_attribute
1380 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1381 decl_attributes ($$, $4); }
1382 | save_filename save_lineno
1383 declarator ':' expr_no_commas maybe_attribute
1384 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1385 decl_attributes ($$, $6); }
1386 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1387 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1388 decl_attributes ($$, $5); }
1391 /* We chain the enumerators in reverse order.
1392 They are put in forward order where enumlist is used.
1393 (The order used to be significant, but no longer is so.
1394 However, we still maintain the order, just to be clean.) */
1398 | enumlist ',' enumerator
1399 { $$ = chainon ($3, $1); }
1405 { $$ = build_enumerator ($1, NULL_TREE); }
1406 | identifier '=' expr_no_commas
1407 { $$ = build_enumerator ($1, $3); }
1411 typed_typespecs absdcl
1412 { $$ = build_tree_list ($1, $2); }
1413 | nonempty_type_quals absdcl
1414 { $$ = build_tree_list ($1, $2); }
1417 absdcl: /* an absolute declarator */
1423 nonempty_type_quals:
1425 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1426 | nonempty_type_quals TYPE_QUAL
1427 { $$ = tree_cons (NULL_TREE, $2, $1); }
1433 | type_quals TYPE_QUAL
1434 { $$ = tree_cons (NULL_TREE, $2, $1); }
1437 absdcl1: /* a nonempty absolute declarator */
1440 /* `(typedef)1' is `int'. */
1441 | '*' type_quals absdcl1 %prec UNARY
1442 { $$ = make_pointer_declarator ($2, $3); }
1443 | '*' type_quals %prec UNARY
1444 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1445 | absdcl1 '(' parmlist %prec '.'
1446 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1447 | absdcl1 '[' expr ']' %prec '.'
1448 { $$ = build_nt (ARRAY_REF, $1, $3); }
1449 | absdcl1 '[' ']' %prec '.'
1450 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1451 | '(' parmlist %prec '.'
1452 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1453 | '[' expr ']' %prec '.'
1454 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1456 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1459 /* at least one statement, the first of which parses without error. */
1460 /* stmts is used only after decls, so an invalid first statement
1461 is actually regarded as an invalid decl and part of the decls. */
1464 lineno_stmt_or_label
1465 | stmts lineno_stmt_or_label
1477 pushlevel: /* empty */
1478 { emit_line_note (input_filename, lineno);
1482 expand_start_bindings (0);
1484 if (objc_method_context)
1490 /* Read zero or more forward-declarations for labels
1491 that nested functions can jump to. */
1496 pedwarn ("ANSI C forbids label declarations"); }
1501 | label_decls label_decl
1505 LABEL identifiers_or_typenames ';'
1507 for (link = $2; link; link = TREE_CHAIN (link))
1509 tree label = shadow_label (TREE_VALUE (link));
1510 C_DECLARED_LABEL_FLAG (label) = 1;
1511 declare_nonlocal_label (label);
1516 /* This is the body of a function definition.
1517 It causes syntax errors to ignore to the next openbrace. */
1525 { $$ = convert (void_type_node, integer_zero_node); }
1526 | '{' pushlevel maybe_label_decls decls xstmts '}'
1527 { emit_line_note (input_filename, lineno);
1528 expand_end_bindings (getdecls (), 1, 0);
1529 $$ = poplevel (1, 1, 0);
1531 | '{' pushlevel maybe_label_decls error '}'
1532 { emit_line_note (input_filename, lineno);
1533 expand_end_bindings (getdecls (), kept_level_p (), 0);
1534 $$ = poplevel (kept_level_p (), 0, 0);
1536 | '{' pushlevel maybe_label_decls stmts '}'
1537 { emit_line_note (input_filename, lineno);
1538 expand_end_bindings (getdecls (), kept_level_p (), 0);
1539 $$ = poplevel (kept_level_p (), 0, 0);
1543 /* Value is number of statements counted as of the closeparen. */
1545 if_prefix lineno_labeled_stmt
1546 /* Make sure expand_end_cond is run once
1547 for each call to expand_start_cond.
1548 Otherwise a crash is likely. */
1554 { emit_line_note ($<filename>-1, $<lineno>0);
1555 expand_start_cond (truthvalue_conversion ($3), 0);
1556 $<itype>1 = stmt_count;
1557 if_stmt_file = $<filename>-1;
1558 if_stmt_line = $<lineno>0;
1559 position_after_white_space (); }
1562 /* This is a subroutine of stmt.
1563 It is used twice, once for valid DO statements
1564 and once for catching errors in parsing the end test. */
1568 emit_line_note ($<filename>-1, $<lineno>0);
1569 /* See comment in `while' alternative, above. */
1571 expand_start_loop_continue_elsewhere (1);
1572 position_after_white_space (); }
1573 lineno_labeled_stmt WHILE
1574 { expand_loop_continue_here (); }
1578 { $$ = input_filename; }
1585 lineno_labeled_stmt:
1586 save_filename save_lineno stmt
1588 /* | save_filename save_lineno error
1591 | save_filename save_lineno label lineno_labeled_stmt
1595 lineno_stmt_or_label:
1596 save_filename save_lineno stmt_or_label
1604 position_after_white_space ();
1605 next = getc (finput);
1606 ungetc (next, finput);
1607 if (pedantic && next == '}')
1608 pedwarn ("ANSI C forbids label at end of compound statement");
1612 /* Parse a single real statement, not including any labels. */
1619 emit_line_note ($<filename>-1, $<lineno>0);
1620 iterator_expand ($1);
1621 clear_momentary (); }
1623 { expand_start_else ();
1624 $<itype>1 = stmt_count;
1625 position_after_white_space (); }
1627 { expand_end_cond ();
1628 if (extra_warnings && stmt_count == $<itype>1)
1629 warning ("empty body in an else-statement"); }
1630 | simple_if %prec IF
1631 { expand_end_cond ();
1632 if (extra_warnings && stmt_count == $<itype>1)
1633 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1634 "empty body in an if-statement"); }
1635 /* Make sure expand_end_cond is run once
1636 for each call to expand_start_cond.
1637 Otherwise a crash is likely. */
1638 | simple_if ELSE error
1639 { expand_end_cond (); }
1642 emit_line_note ($<filename>-1, $<lineno>0);
1643 /* The emit_nop used to come before emit_line_note,
1644 but that made the nop seem like part of the preceding line.
1645 And that was confusing when the preceding line was
1646 inside of an if statement and was not really executed.
1647 I think it ought to work to put the nop after the line number.
1648 We will see. --rms, July 15, 1991. */
1651 { /* Don't start the loop till we have succeeded
1652 in parsing the end test. This is to make sure
1653 that we end every loop we start. */
1654 expand_start_loop (1);
1655 emit_line_note (input_filename, lineno);
1656 expand_exit_loop_if_false (NULL_PTR,
1657 truthvalue_conversion ($4));
1658 position_after_white_space (); }
1660 { expand_end_loop (); }
1663 { emit_line_note (input_filename, lineno);
1664 expand_exit_loop_if_false (NULL_PTR,
1665 truthvalue_conversion ($3));
1667 clear_momentary (); }
1668 /* This rule is needed to make sure we end every loop we start. */
1669 | do_stmt_start error
1670 { expand_end_loop ();
1671 clear_momentary (); }
1675 emit_line_note ($<filename>-1, $<lineno>0);
1676 /* See comment in `while' alternative, above. */
1678 if ($3) c_expand_expr_stmt ($3);
1679 /* Next step is to call expand_start_loop_continue_elsewhere,
1680 but wait till after we parse the entire for (...).
1681 Otherwise, invalid input might cause us to call that
1682 fn without calling expand_end_loop. */
1685 /* Can't emit now; wait till after expand_start_loop... */
1686 { $<lineno>7 = lineno;
1687 $<filename>$ = input_filename; }
1690 /* Start the loop. Doing this after parsing
1691 all the expressions ensures we will end the loop. */
1692 expand_start_loop_continue_elsewhere (1);
1693 /* Emit the end-test, with a line number. */
1694 emit_line_note ($<filename>8, $<lineno>7);
1696 expand_exit_loop_if_false (NULL_PTR,
1697 truthvalue_conversion ($6));
1698 /* Don't let the tree nodes for $9 be discarded by
1699 clear_momentary during the parsing of the next stmt. */
1701 $<lineno>7 = lineno;
1702 $<filename>8 = input_filename;
1703 position_after_white_space (); }
1705 { /* Emit the increment expression, with a line number. */
1706 emit_line_note ($<filename>8, $<lineno>7);
1707 expand_loop_continue_here ();
1709 c_expand_expr_stmt ($9);
1711 expand_end_loop (); }
1712 | SWITCH '(' expr ')'
1714 emit_line_note ($<filename>-1, $<lineno>0);
1715 c_expand_start_case ($3);
1716 /* Don't let the tree nodes for $3 be discarded by
1717 clear_momentary during the parsing of the next stmt. */
1719 position_after_white_space (); }
1721 { expand_end_case ($3);
1725 emit_line_note ($<filename>-1, $<lineno>0);
1726 if ( ! expand_exit_something ())
1727 error ("break statement not within loop or switch"); }
1730 emit_line_note ($<filename>-1, $<lineno>0);
1731 if (! expand_continue_loop (NULL_PTR))
1732 error ("continue statement not within a loop"); }
1735 emit_line_note ($<filename>-1, $<lineno>0);
1736 c_expand_return (NULL_TREE); }
1739 emit_line_note ($<filename>-1, $<lineno>0);
1740 c_expand_return ($2); }
1741 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1743 emit_line_note ($<filename>-1, $<lineno>0);
1745 if ((TREE_CODE ($4) == ADDR_EXPR
1746 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1747 || TREE_CODE ($4) == STRING_CST)
1750 error ("argument of `asm' is not a constant string"); }
1751 /* This is the case with just output operands. */
1752 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1754 emit_line_note ($<filename>-1, $<lineno>0);
1755 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1756 $2 == ridpointers[(int)RID_VOLATILE],
1757 input_filename, lineno); }
1758 /* This is the case with input operands as well. */
1759 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1761 emit_line_note ($<filename>-1, $<lineno>0);
1762 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1763 $2 == ridpointers[(int)RID_VOLATILE],
1764 input_filename, lineno); }
1765 /* This is the case with clobbered registers as well. */
1766 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1767 asm_operands ':' asm_clobbers ')' ';'
1769 emit_line_note ($<filename>-1, $<lineno>0);
1770 c_expand_asm_operands ($4, $6, $8, $10,
1771 $2 == ridpointers[(int)RID_VOLATILE],
1772 input_filename, lineno); }
1773 | GOTO identifier ';'
1776 emit_line_note ($<filename>-1, $<lineno>0);
1777 decl = lookup_label ($2);
1780 TREE_USED (decl) = 1;
1786 emit_line_note ($<filename>-1, $<lineno>0);
1787 expand_computed_goto (convert (ptr_type_node, $3)); }
1792 all_iter_stmt_simple
1793 /* | all_iter_stmt_with_decl */
1796 all_iter_stmt_simple:
1799 /* The value returned by this action is */
1800 /* 1 if everything is OK */
1801 /* 0 in case of error or already bound iterator */
1804 if (TREE_CODE ($3) != VAR_DECL)
1805 error ("invalid `for (ITERATOR)' syntax");
1806 if (! ITERATOR_P ($3))
1807 error ("`%s' is not an iterator",
1808 IDENTIFIER_POINTER (DECL_NAME ($3)));
1809 else if (ITERATOR_BOUND_P ($3))
1810 error ("`for (%s)' inside expansion of same iterator",
1811 IDENTIFIER_POINTER (DECL_NAME ($3)));
1815 iterator_for_loop_start ($3);
1821 iterator_for_loop_end ($3);
1824 /* This really should allow any kind of declaration,
1825 for generality. Fix it before turning it back on.
1827 all_iter_stmt_with_decl:
1828 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1830 */ /* The value returned by this action is */
1831 /* 1 if everything is OK */
1832 /* 0 in case of error or already bound iterator */
1834 iterator_for_loop_start ($6);
1838 iterator_for_loop_end ($6);
1839 emit_line_note (input_filename, lineno);
1840 expand_end_bindings (getdecls (), 1, 0);
1841 $<ttype>$ = poplevel (1, 1, 0);
1846 /* Any kind of label, including jump labels and case labels.
1847 ANSI C accepts labels only before statements, but we allow them
1848 also at the end of a compound statement. */
1850 label: CASE expr_no_commas ':'
1851 { register tree value = check_case_value ($2);
1853 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1857 if (value != error_mark_node)
1860 int success = pushcase (value, label, &duplicate);
1862 error ("case label not within a switch statement");
1863 else if (success == 2)
1865 error ("duplicate case value");
1866 error_with_decl (duplicate, "this is the first entry for that value");
1868 else if (success == 3)
1869 warning ("case value out of range");
1870 else if (success == 5)
1871 error ("case label within scope of cleanup or variable array");
1873 position_after_white_space (); }
1874 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
1875 { register tree value1 = check_case_value ($2);
1876 register tree value2 = check_case_value ($4);
1878 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1882 if (value1 != error_mark_node && value2 != error_mark_node)
1885 int success = pushcase_range (value1, value2, label,
1888 error ("case label not within a switch statement");
1889 else if (success == 2)
1891 error ("duplicate case value");
1892 error_with_decl (duplicate, "this is the first entry for that value");
1894 else if (success == 3)
1895 warning ("case value out of range");
1896 else if (success == 4)
1897 warning ("empty case range");
1898 else if (success == 5)
1899 error ("case label within scope of cleanup or variable array");
1901 position_after_white_space (); }
1906 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1907 int success = pushcase (NULL_TREE, label, &duplicate);
1910 error ("default label not within a switch statement");
1911 else if (success == 2)
1913 error ("multiple default labels in one switch");
1914 error_with_decl (duplicate, "this is the first default label");
1916 position_after_white_space (); }
1918 { tree label = define_label (input_filename, lineno, $1);
1922 expand_label (label);
1923 position_after_white_space (); }
1926 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
1930 { emit_line_note (input_filename, lineno); }
1932 { emit_line_note (input_filename, lineno); }
1941 /* These are the operands other than the first string and colon
1942 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
1943 asm_operands: /* empty */
1945 | nonnull_asm_operands
1948 nonnull_asm_operands:
1950 | nonnull_asm_operands ',' asm_operand
1951 { $$ = chainon ($1, $3); }
1956 { $$ = build_tree_list ($1, $3); }
1961 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
1962 | asm_clobbers ',' string
1963 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
1966 /* This is what appears inside the parens in a function declarator.
1967 Its value is a list of ..._TYPE nodes. */
1970 clear_parm_order ();
1971 declare_parm_level (0); }
1974 parmlist_tags_warning ();
1975 poplevel (0, 0, 0); }
1983 pedwarn ("ANSI C forbids forward parameter declarations");
1984 /* Mark the forward decls as such. */
1985 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
1986 TREE_ASM_WRITTEN (parm) = 1;
1987 clear_parm_order (); }
1991 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
1994 /* This is what appears inside the parens in a function declarator.
1995 Is value is represented in the format that grokdeclarator expects. */
1996 parmlist_2: /* empty */
1997 { $$ = get_parm_info (0); }
1999 { $$ = get_parm_info (0);
2001 pedwarn ("ANSI C requires a named argument before `...'");
2004 { $$ = get_parm_info (1); }
2005 | parms ',' ELLIPSIS
2006 { $$ = get_parm_info (0); }
2011 { push_parm_decl ($1); }
2013 { push_parm_decl ($3); }
2016 /* A single parameter declaration or parameter type name,
2017 as found in a parmlist. */
2019 typed_declspecs parm_declarator
2020 { $$ = build_tree_list ($1, $2) ; }
2021 | typed_declspecs notype_declarator
2022 { $$ = build_tree_list ($1, $2) ; }
2023 | typed_declspecs absdcl
2024 { $$ = build_tree_list ($1, $2); }
2025 | declmods notype_declarator
2026 { $$ = build_tree_list ($1, $2) ; }
2028 { $$ = build_tree_list ($1, $2); }
2031 /* This is used in a function definition
2032 where either a parmlist or an identifier list is ok.
2033 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2034 parmlist_or_identifiers:
2036 clear_parm_order ();
2037 declare_parm_level (1); }
2038 parmlist_or_identifiers_1
2040 parmlist_tags_warning ();
2041 poplevel (0, 0, 0); }
2044 parmlist_or_identifiers_1:
2048 for (t = $1; t; t = TREE_CHAIN (t))
2049 if (TREE_VALUE (t) == NULL_TREE)
2050 error ("`...' in old-style identifier list");
2051 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2054 /* A nonempty list of identifiers. */
2057 { $$ = build_tree_list (NULL_TREE, $1); }
2058 | identifiers ',' IDENTIFIER
2059 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2062 /* A nonempty list of identifiers, including typenames. */
2063 identifiers_or_typenames:
2065 { $$ = build_tree_list (NULL_TREE, $1); }
2066 | identifiers_or_typenames ',' identifier
2067 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2071 /* Objective-C productions. */
2081 if (objc_implementation_context)
2083 finish_class (objc_implementation_context);
2084 objc_ivar_chain = NULL_TREE;
2085 objc_implementation_context = NULL_TREE;
2088 warning ("`@end' must appear in an implementation context");
2092 /* A nonempty list of identifiers. */
2095 { $$ = build_tree_list (NULL_TREE, $1); }
2096 | identifier_list ',' identifier
2097 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2101 CLASS identifier_list ';'
2103 objc_declare_class ($2);
2107 ALIAS identifier identifier ';'
2109 objc_declare_alias ($2, $3);
2113 INTERFACE identifier protocolrefs '{'
2115 objc_interface_context = objc_ivar_context
2116 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2117 objc_public_flag = 0;
2121 continue_class (objc_interface_context);
2126 finish_class (objc_interface_context);
2127 objc_interface_context = NULL_TREE;
2130 | INTERFACE identifier protocolrefs
2132 objc_interface_context
2133 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2134 continue_class (objc_interface_context);
2139 finish_class (objc_interface_context);
2140 objc_interface_context = NULL_TREE;
2143 | INTERFACE identifier ':' identifier protocolrefs '{'
2145 objc_interface_context = objc_ivar_context
2146 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2147 objc_public_flag = 0;
2151 continue_class (objc_interface_context);
2156 finish_class (objc_interface_context);
2157 objc_interface_context = NULL_TREE;
2160 | INTERFACE identifier ':' identifier protocolrefs
2162 objc_interface_context
2163 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2164 continue_class (objc_interface_context);
2169 finish_class (objc_interface_context);
2170 objc_interface_context = NULL_TREE;
2173 | IMPLEMENTATION identifier '{'
2175 objc_implementation_context = objc_ivar_context
2176 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2177 objc_public_flag = 0;
2182 = continue_class (objc_implementation_context);
2185 | IMPLEMENTATION identifier
2187 objc_implementation_context
2188 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2190 = continue_class (objc_implementation_context);
2193 | IMPLEMENTATION identifier ':' identifier '{'
2195 objc_implementation_context = objc_ivar_context
2196 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2197 objc_public_flag = 0;
2202 = continue_class (objc_implementation_context);
2205 | IMPLEMENTATION identifier ':' identifier
2207 objc_implementation_context
2208 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2210 = continue_class (objc_implementation_context);
2213 | INTERFACE identifier '(' identifier ')' protocolrefs
2215 objc_interface_context
2216 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2217 continue_class (objc_interface_context);
2222 finish_class (objc_interface_context);
2223 objc_interface_context = NULL_TREE;
2226 | IMPLEMENTATION identifier '(' identifier ')'
2228 objc_implementation_context
2229 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2231 = continue_class (objc_implementation_context);
2236 PROTOCOL identifier protocolrefs
2238 remember_protocol_qualifiers ();
2239 objc_interface_context
2240 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2244 forget_protocol_qualifiers();
2245 finish_protocol(objc_interface_context);
2246 objc_interface_context = NULL_TREE;
2255 | ARITHCOMPARE identifier_list ARITHCOMPARE
2257 if ($1 == LT_EXPR && $3 == GT_EXPR)
2265 ivar_decl_list visibility_spec ivar_decls
2270 PRIVATE { objc_public_flag = 2; }
2271 | PROTECTED { objc_public_flag = 0; }
2272 | PUBLIC { objc_public_flag = 1; }
2280 | ivar_decls ivar_decl ';'
2284 pedwarn ("extra semicolon in struct or union specified");
2289 /* There is a shift-reduce conflict here, because `components' may
2290 start with a `typename'. It happens that shifting (the default resolution)
2291 does the right thing, because it treats the `typename' as part of
2292 a `typed_typespecs'.
2294 It is possible that this same technique would allow the distinction
2295 between `notype_initdecls' and `initdecls' to be eliminated.
2296 But I am being cautious and not trying it. */
2299 typed_typespecs setspecs ivars
2302 resume_momentary ($2);
2304 | nonempty_type_quals setspecs ivars
2307 resume_momentary ($2);
2317 | ivars ',' ivar_declarator
2323 $$ = add_instance_variable (objc_ivar_context,
2325 $1, current_declspecs,
2328 | declarator ':' expr_no_commas
2330 $$ = add_instance_variable (objc_ivar_context,
2332 $1, current_declspecs, $3);
2334 | ':' expr_no_commas
2336 $$ = add_instance_variable (objc_ivar_context,
2339 current_declspecs, $2);
2346 remember_protocol_qualifiers ();
2347 if (objc_implementation_context)
2348 objc_inherit_code = CLASS_METHOD_DECL;
2350 fatal ("method definition not in class context");
2354 forget_protocol_qualifiers ();
2355 add_class_method (objc_implementation_context, $3);
2356 start_method_def ($3);
2357 objc_method_context = $3;
2361 continue_method_def ();
2365 finish_method_def ();
2366 objc_method_context = NULL_TREE;
2371 remember_protocol_qualifiers ();
2372 if (objc_implementation_context)
2373 objc_inherit_code = INSTANCE_METHOD_DECL;
2375 fatal ("method definition not in class context");
2379 forget_protocol_qualifiers ();
2380 add_instance_method (objc_implementation_context, $3);
2381 start_method_def ($3);
2382 objc_method_context = $3;
2386 continue_method_def ();
2390 finish_method_def ();
2391 objc_method_context = NULL_TREE;
2395 /* the reason for the strange actions in this rule
2396 is so that notype_initdecls when reached via datadef
2397 can find a valid list of type and sc specs in $0. */
2401 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2404 methodprotolist2: /* eliminates a shift/reduce conflict */
2407 | methodprotolist2 methodproto
2408 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2419 objc_inherit_code = CLASS_METHOD_DECL;
2423 add_class_method (objc_interface_context, $3);
2429 objc_inherit_code = INSTANCE_METHOD_DECL;
2433 add_instance_method (objc_interface_context, $3);
2439 '(' typename ')' unaryselector
2441 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2446 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2449 | '(' typename ')' keywordselector optparmlist
2451 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2454 | keywordselector optparmlist
2456 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2460 /* "optarglist" assumes that start_method_def has already been called...
2461 if it is not, the "xdecls" will not be placed in the proper scope */
2468 /* to get around the following situation: "int foo (int a) int b; {}" that
2469 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2484 typed_declspecs setspecs myparms ';'
2485 { resume_momentary ($2); }
2486 | typed_declspecs ';'
2487 { shadow_tag ($1); }
2489 { pedwarn ("empty declaration"); }
2494 { push_parm_decl ($1); }
2495 | myparms ',' myparm
2496 { push_parm_decl ($3); }
2499 /* A single parameter declaration or parameter type name,
2500 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2504 { $$ = build_tree_list (current_declspecs, $1) ; }
2506 { $$ = build_tree_list (current_declspecs, $1) ; }
2508 { $$ = build_tree_list (current_declspecs, $1) ; }
2518 /* oh what a kludge! */
2527 /* returns a tree list node generated by get_parm_info */
2540 | keywordselector keyworddecl
2542 $$ = chainon ($1, $2);
2554 ENUM { $$ = get_identifier (token_buffer); }
2555 | STRUCT { $$ = get_identifier (token_buffer); }
2556 | UNION { $$ = get_identifier (token_buffer); }
2557 | IF { $$ = get_identifier (token_buffer); }
2558 | ELSE { $$ = get_identifier (token_buffer); }
2559 | WHILE { $$ = get_identifier (token_buffer); }
2560 | DO { $$ = get_identifier (token_buffer); }
2561 | FOR { $$ = get_identifier (token_buffer); }
2562 | SWITCH { $$ = get_identifier (token_buffer); }
2563 | CASE { $$ = get_identifier (token_buffer); }
2564 | DEFAULT { $$ = get_identifier (token_buffer); }
2565 | BREAK { $$ = get_identifier (token_buffer); }
2566 | CONTINUE { $$ = get_identifier (token_buffer); }
2567 | RETURN { $$ = get_identifier (token_buffer); }
2568 | GOTO { $$ = get_identifier (token_buffer); }
2569 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2570 | SIZEOF { $$ = get_identifier (token_buffer); }
2571 | TYPEOF { $$ = get_identifier (token_buffer); }
2572 | ALIGNOF { $$ = get_identifier (token_buffer); }
2573 | TYPESPEC | TYPE_QUAL
2577 selector ':' '(' typename ')' identifier
2579 $$ = build_keyword_decl ($1, $4, $6);
2582 | selector ':' identifier
2584 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2587 | ':' '(' typename ')' identifier
2589 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2594 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2605 | keywordarglist keywordarg
2607 $$ = chainon ($1, $2);
2615 if (TREE_CHAIN ($1) == NULL_TREE)
2616 /* just return the expr., remove a level of indirection */
2617 $$ = TREE_VALUE ($1);
2619 /* we have a comma expr., we will collapse later */
2625 selector ':' keywordexpr
2627 $$ = build_tree_list ($1, $3);
2631 $$ = build_tree_list (NULL_TREE, $2);
2639 $$ = get_class_reference ($1);
2645 { objc_receiver_context = 1; }
2647 { objc_receiver_context = 0; }
2650 $$ = build_tree_list ($3, $5);
2661 | keywordnamelist keywordname
2663 $$ = chainon ($1, $2);
2670 $$ = build_tree_list ($1, NULL_TREE);
2674 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2679 SELECTOR '(' selectorarg ')'
2686 PROTOCOL '(' identifier ')'
2692 /* extension to support C-structures in the archiver */
2695 ENCODE '(' typename ')'
2697 $$ = groktypename ($3);